the present study is an attempt toward evaluating the performance of portfolios and assets selecting using modified mean-variance models by utilizing a non-parametric efficiency analysis tool, namely data envelopment analysis (dea). huge amounts of money are being invested in financial market. as a result, portfolio performance evaluation has created a great deal of interest among people. we kn...

The aim of this study is to define and introduce the variable of export entrepreneurship and factors affecting it in a global export-centric model. However, we seek to find the effect of the variables of export entrepreneurship and export market orientation‎ on export performance. To test the research hypotheses, a sample of 296 people employed in food and agricultural products company located ...